This commit changes the custom flags admin config area
to use the AdminPageHeader component and conforms
to the new admin UI guidelines. Also makes some slight
modifications to the reusable components to handle using
a @route for an action button.
Allow admin to create custom flag which requires an additional message.
I decided to rename the old `custom_flag` into `require_message` as it is more descriptive.
Allow admin to create custom flag which requires an additional message.
I decided to rename the old `custom_flag` into `require_message` as it is more descriptive.